Psychology professor Gordon G. Gallup Jr. is an evolutionary psychologist interested in reproductive competition and the biology of interpersonal attraction.

Gallup, former editor of the Journal of Comparative Psychology, has more than 250 publications on topics such as self-recognition, the evolution of intelligence, human reproductive competition, semen chemistry and behavior, predator-prey relations, paternal assurance tactics, rape avoidance strategies, and the biology of interpersonal attraction, mirror test for self-awareness in chimpanzees.

Some of his recent publications include research on the psychobiology of romantic kissing, yawning as a brain cooling mechanism, and preeclampsia.